The table sql_languages contains one
row for each SQL language binding that is supported by
PostgreSQL. PostgreSQL supports direct SQL and embedded
SQL in C; that is all you will learn from this table.

Table 33-32. sql_languages Columns

Name

Data Type

Description

sql_language_source

character_data

The name of the source of the language definition;
always ISO 9075, that is, the
SQL standard

sql_language_year

character_data

The year the standard referenced in sql_language_source was approved;
currently 2003

sql_language_conformance

character_data

The standard conformance level for the language
binding. For ISO 9075:2003 this is always CORE.

sql_language_integrity

character_data

Always null (This value is relevant to an earlier
version of the SQL standard.)

sql_language_implementation

character_data

Always null

sql_language_binding_style

character_data

The language binding style, either DIRECT or EMBEDDED

sql_language_programming_language

character_data

The programming language, if the binding style is
EMBEDDED, else null.
PostgreSQL only supports
the language C.